package filters;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet Filter implementation class AuthenticationFilter
 */
public class AuthenticationFilter implements Filter {

    /**
     * Default constructor. 
     */
    public AuthenticationFilter() {
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		
		try {
			HttpServletRequest hreq = null;
			HttpServletResponse hresp = null;
			if (request instanceof HttpServletRequest)
				hreq = (HttpServletRequest) request;
			if (response instanceof HttpServletResponse)
				hresp = (HttpServletResponse) response;
			
			Boolean authenticated = (Boolean) hreq.getSession().getAttribute("logged");
			
			if (authenticated == null || !authenticated) {
				out.println("<p id='message'>Vous devez vous authentifier.</p>");
				return;
			}
			
			chain.doFilter(hreq, hresp);
		}
		catch (Throwable e) {
			e.printStackTrace();
		}
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		// TODO Auto-generated method stub
	}

}
